@tsarstepan,
This is a dirty industry, but there are (at least in my country) some serious problems threatening the quality of school education that may well force the hand of some students to do something exactly akin to the above.
Simple facts: 1. Some students have requirements for their studies (for instance, the dutch language), but there are no teachers to actually teach them the material they need to study. So they don't get any lessons, but they are nevertheless still required to pass this particular exam in order to get their diploma.
Couple that with the fact that education is becoming increasingly more expensive, requiring students to premeditate on the education they desire and to invest in their future in terms of a loan, and you get
a) increasing (financial) pressure to complete your education in a timely manner and
b) problems meeting the requirements for their exams not due to your own failure, but due to the failing system.
Can we all at least agree that these combined factors would certainly make this 'cheating' behavior more prevalent, however problematic it may be? If the system fails the students, can you blame them for trying to get their degree in a less savory manner?
There's more at stake than just their honor: it's their livelihood and the financial burdens that loom on the horizon as well.